I'm starting a campaign and I think it'd be cool if I could be a human and have tremorsense. I know it'd be hard, but I'd be willing to take a lot of negative stats to counteract that. If it'd be hard to start with it, how could I get trained in it?

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Hi Scar and welcome to the site. Could you please explain which edition of D&D are you going to play? You can label the question with the appropriate tag (dnd-3.5e, dnd-4e, pathfinder and so on)
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Erik BurigoMay 21 '12 at 10:55

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This is closed till you clarify what edition of D&D you're talking about... It can be reopened once you clarify. The answer is significantly different per edition.
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mxyzplk♦May 23 '12 at 23:19

touching the ground, you can take a move action to sense the number of creatures within 20 feet that are also touching the ground and the direction to each one. You cannot pinpoint the location of any creature with this feat.

automatically pinpoint the location of anything that is moving and in contact with the ground so long as it is within 10 feet. The range expands to 20 feet if you are in an area covered in a layer of at least 1 inch of ash, dust, loose earth, or sand. This ability only tells you what square the creature is in, so you still have the normal miss chance from concealment if you cannot see the creature.

This answer would be better if it answered the question about a starting character with tremorsense - a lot of these are clearly higher-level-only techniques.
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mxyzplk♦May 23 '12 at 23:21

@mxyzplk Upon reflection the classes do require a higher level than the OP appears to be looking for. Is it acceptable on rpg.se to effectively answer the question with "do not do that because..."? I know that other se sites have that policy, and if a similar policy exists here then I hope this answer will stand, if it does not then please edit out the inapplicable parts, or if an edit would leave no effective content remove it entirely.
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Joshua DrakeMay 23 '12 at 23:54

Feel free and edit your own post, I'm just saying you are at risk of downvote for not accurately answering the question posed.
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mxyzplk♦May 24 '12 at 3:39

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Given that many campaigns start at a level higher than 1, I don't immediately interpret "start a character" as "build a level 1 character".
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BrilliandMar 25 '14 at 21:25